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基于OBE理念的嵌入式系统实践教学改革探索

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科教导刊 2024年第21期 138-140页

作者：康燕萍黄鹏桂林理工大学广西桂林541004 桂林信息科技学院广西桂林541004

嵌入式系统实践是计算机科学与技术专业的一门专业实践课程。在工程教育专业认证和一流本科课程建设背景下,针对传统嵌入式系统实践教学脱离企业用人需求、缺乏个性化教学、硬件平台跟不上等问题,文章以OBE理念为核心,围绕产学合作、跨... 详细信息

嵌入式系统实践是计算机科学与技术专业的一门专业实践课程。在工程教育专业认证和一流本科课程建设背景下,针对传统嵌入式系统实践教学脱离企业用人需求、缺乏个性化教学、硬件平台跟不上等问题,文章以OBE理念为核心,围绕产学合作、跨学科融合,结合分层次和多元化教学方式,提出了一种融入OBE理念的嵌入式系统实践教学改革方案,可实现对学生多维度、全方位、全过程的教育,帮助学生全面发展技术能力、解决问题的能力,以及团队合作能力,从而更好地适应工程领域的需求。

关键词： OBE理念嵌入式系统实践教学分层次多元化

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Coupling mechanism of mathematical models for sediment transport based on characteristic theory

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Science China(Technological Sciences) 2016年第11期59卷 1696-1706页

作者： DING Yun LI ZuiSen ZHONG DeYu kang yanping State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University Nanjing 210098 China Zhejiang Institute of Hydraulics and Estuary Hangzhou 310008 China State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China Jiangsu Hydraulic Research Institute Nanjing 210017 China

This paper aims to explore the coupling mechanism between flow movement, sediment transport and riverbed evolution in currently widely used mathematical models for sediment transport. Based on characteristic theory, analytic forms of eigenvalues,eigenvectors and characteristic relationships of total-sediment transport model, bed-load transport model and suspenedload transport model were derived, respectively. The singular perturbation technology was implemented to obtain the asymptotic solutions to different families of eigenvalues. The results indicate that, interactions between motion variables were explicitly coupled in the characteristics of total-sediment transport model and bed-load transport model. Further qualitative and quantitative analysis demonstrates that high sediment transport intensity and significant riverbed change will inevitably affect the property of flow movement. In the process of deposition, sediment-laden flow will move faster when sediment transport intensity becomes stronger. In contrast, the wave of flow will propagate at slower speed as erosion intensity becomes *** most existing suspended-load transport models, however, the characteristics are decoupled as the interactions between motion variables cannot be integrally illustrated in eigenvalues, eigenvectors and characteristic relationship.

关键词：联合机制数学模型沉积运输特征特征值

New steelmaking process based on clean deoxidation technology

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1249-1262页

作者： Zhongliang Wang yanping Bao State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

After the converter steelmaking process,a considerable number of ferroalloys are needed to remove dissolved oxygen from the molten steel,but it also forms a lot of oxide inclusions that cannot be completely *** the same time,it increases the carbon emis-sions in the steel production *** years of research,our team have developed a series of clean deoxidation technologies,includ-ing carbon deoxidation,hydrogen deoxidation,and waste plastic deoxidation of molten steel to address the aforementioned *** this study,thermodynamic calculations and laboratory experiments were employed to verify that carbon and hydrogen can reduce the total oxygen content in the molten steel melt to below 5×10^(-6) and 10×10^(-6),*** analysis of the deoxidation mechanisms and ef-fects of polyethylene and polypropylene was also *** addition,the applications of carbon deoxidation technology in different steels with the hot-state experiment and industrial production were discussed *** carbon deoxidation experimental results of different steels were as follows:(1)the oxygen content of bearing steel was effectively controlled at 6.3×10^(-6) and the inclusion number density was lowered by 74.73%compared to aluminum deoxidized bearing steel;(2)the oxygen content in gear steel was reduced to 7.7×10^(-6) and a 54.49%reduction of inclusion number density was achieved with almost no inclusions larger than 5μm from the average level of industry gear steels;(3)a total oxygen content of M2 high-speed steel was as low as 3.7×10^(-6).In industrial production practice,car-bon deoxidation technique was applied in the final deoxidation stage for non-aluminum deoxidized bearing steel,and it yielded excellent results that the oxygen content was reduced to below 8×10^(-6) and the oxide inclusions in the steel mainly consist of silicates,along with small amounts of spinel and calcium aluminate.

关键词： clean deoxidation carbon deoxidation hydrogen deoxidation waste plastics deoxidation

Development and prospects of molten steel deoxidation in steelmaking process

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International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 18-32页

作者： Zhongliang Wang yanping Bao State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

In the long traditional process of steelmaking,excess oxygen is blown into the converter,and alloying elements are used for *** inevitably results in excessive deoxidation of products remaining within the steel liquid,affecting the cleanliness of the *** the increasing requirements for steel performance,reducing the oxygen content in the steel liquid and ensuring its high cleanliness is *** more than a hundred years of development,the total oxygen content in steel has been reduced from approximately 100×10^(-6)to approximately 10×10^(-6),and it can be controlled below 5×10^(-6)in some steel grades.A relatively stable and mature deoxidation technology has been formed,but further reducing the oxygen content in steel is no longer significant for improving steel *** research team developed a deoxidation technology for bearing steel by optimizing the entire conventional *** technology combines silicon–manganese predeoxidation,ladle furnace diffusion deoxidation,and vacuum final *** successfully conducted industrial experiments and produced interstitial-free steel with natural decarbonization ***-aluminum deoxidation was found to control the oxygen content in bearing steel to between 4×10^(-6) and 8×10^(-6),altering the type of inclusions,eliminating large particle Ds-type inclusions,improving the flowability of the steel liquid,and deriving a higher fatigue *** natural decarbonization predeoxidation of interstitial-free steel reduced aluminum consumption and production costs and significantly improved the quality of cast billets.

关键词： steel deoxidation deoxidizer metallurgical equipment bearing steel IF steel

The quantity of OA and activity of cellulase and polygalacturonase are involved in variation of virulence in Sclerotium rolfsii

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Oil Crop Science 2023年第2期8卷 121-126页

作者： Dongyang Yu Wanduo Song Qianqian Wang yanping kang Yong Lei Zhihui Wang Yuning Chen Dongxin Huai Wang Xin Boshou Liao Liying Yan Oil Crops Research Institute Chinese Academy of Agricultural SciencesKey Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of Agricultural and Rural AffairsHubeiWuhan430062China

In order to understand the pathogenic mechanisms of Sclerotium rolfsii on peanut and to analyze the variation of virulence in *** strains,the highly virulent strain(ZY2)and weakly virulent strain(GP3-1)were investigated under both in vivo and in vitro *** results indicated that *** directly infected peanut by producing infection ***2 formed infection cushions earlier than GP3-1,and ZY2 produced a greater number of infection cushions compare to *** strains could utilize cellulose,xylose,or polygalacturonic acid in the Czapek *** activities of cellulase(CL)and polygalacturonase(PG)in the inoculated peanut stems increased significantly at 9 h after *** activities of CL and PG produced by ZY2 in the inoculated stems were significantly higher than that produced by *** strains could produce oxalic acid(OA),and the content of OA produced by ZY2 in the inoculated stems was higher than that produced by *** summary,it suggested that *** destroyed peanut cells through physical and biochemical factors by secreting a large amount of OA,CL and PG during the formation of infection *** difference in OA content,activity of CL and PG produced by highly and weakly virulent strains played important roles in variation of virulence.

关键词： Sclerotium rolfsii Sacc. Pathogenicity Virulence variation Microscopic observation Oxalic acid Cell wall degrading enzyme

Correlation and variability analysis of yield and quality related traits in different peanut varieties across various ecological zones of China

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Oil Crop Science 2023年第4期8卷 236-242页

作者： Zhihui Wang Yue Zhang Liying Yan Yuning Chen yanping kang Dongxin Huai Xin Wang Kede Liu Huifang Jiang Yong Lei Boshou Liao The Key Laboratory of Biology and Genetic Improvement of Oil Crops The Ministry of Agriculture and Rural AffairsOil Crops Research Institute of Chinese Academy of Agricultural SciencesWuhan430062China National Key Laboratory of Crop Genetic Improvement National Center of Crop Molecular Breeding TechnologyNational Center of Oil Crop Improvement(Wuhan)Huazhong Agricultural UniversityWuhan430070China

Peanut cultivation in China spans various ecological zones, each with unique environmental conditions. Identifying suitable peanut varieties for these regions has been challenging due to significant phenotypic variations observed across environments. This study, based on a comprehensive analysis of 256 peanut varieties, selected nine representative varieties(Huayu23, Yuanza9102, Silihong, Wanhua2, Zhonghua6, Zhonghua16, Zhonghua21,Zhonghua215, Zhonghua24) for cultivation in five distinct ecological zones including Chengdu, Hefei, Nanjing,Shijiazhuang, and Wuhan. The yield and quality related phenotypic traits of these varieties were thoroughly assessed, revealing a complex interplay between genetic and environmental factors. Principal component analysis(PCA) effectively distinguished varieties based on yield and quality traits. Strong correlations were observed between specific traits, such as seed size and quality components. The G × E interaction was evident, as some varieties consistently performed better in certain environments. Varieties with lower coefficient of variation(CV)values exhibited stable trait expression, making them reliable choices for broad cultivation. In contrast, varieties with higher CV values displayed greater sensitivity to environmental fluctuations, potentially due to specific genetic factors. Two high oleic acid varieties, Zhonghua24 and Zhonghua215, demonstrated remarkable stability in oleic acid content across diverse environments, suggesting the presence of genetic mechanisms that buffer against environmental variations. Overall, this study underscores the importance of selecting peanut varieties based on their adaptability and performance in specific ecological zones. These findings provide valuable insights for peanut breeders and farmers, facilitating informed decisions for improved crop production and quality.

关键词： Peanut Yield trait Quality trait Correlation analysis Variability analysis

快速高效鉴定花生青枯病抗性的水培接种新方法研究

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植物病理学报 2024年第1期54卷 204-208页

作者：宋万朵晏立英于东洋康彦平雷永陈玉宁淮东欣王欣王志慧罗怀勇姜慧芳廖伯寿油料作物生物学与遗传育种重点实验室/中国农业科学院油料作物研究所武汉430062

0引言花生(Arachis hypogaea L)是我国重要的油料和经济作物之一,受青枯病危害较重,该病害由雷尔氏青枯菌(Ralstonia solanacearum)引起,在我国主要产区均有发生,危害面积约占种植面积的1/10,居世界首位[1]。花生青枯病防治难度大,种植... 详细信息

0引言花生(Arachis hypogaea L)是我国重要的油料和经济作物之一,受青枯病危害较重,该病害由雷尔氏青枯菌(Ralstonia solanacearum)引起,在我国主要产区均有发生,危害面积约占种植面积的1/10,居世界首位[1]。花生青枯病防治难度大,种植抗病品种是最经济有效的措施。自上世纪七十年代以来,相继建立了田间自然病圃法[2-3]、浸种法[4]、针刺法[5]、剪叶法[6]等花生青枯病抗性鉴定技术。

关键词：花生青枯病种植抗病品种危害面积防治难度青枯病抗性病圃剪叶青枯菌

Nitsche-XFEM for a time fractional diffusion interface problem

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Science China Mathematics 2024年第3期67卷 665-682页

作者： Tao Wang yanping Chen China Nuclear Power Technology Research Institute Co.Ltd. Shenzhen 518028China School of Mathematical Sciences South China Normal UniversityGuangzhou 510631China

In this paper, we propose a space-time finite element method for a time fractional diffusion interface problem. This method uses the low-order discontinuous Galerkin(DG) method and the Nitsche extended finite element method(Nitsche-XFEM) for temporal and spatial discretization, respectively. Sharp pointwise-in-time error estimates in graded temporal grids are derived, without any smoothness assumptions on the ***, three numerical examples are provided to verify the theoretical results.

关键词： fractional diffusion interface discontinuous Galerkin Nitsche-XFEM error estimates

GENERALIZED JACOBI SPECTRAL GALERKIN METHOD FOR FRACTIONAL-ORDER VOLTERRA INTEGRO-DIFFERENTIAL EQUATIONS WITH WEAKLY SINGULAR KERNELS

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Journal of Computational Mathematics 2024年第2期42卷 355-371页

作者： yanping Chen Zhenrong Chen Yunqing Huang School of Mathematical Sciences South China Normal UniversityGuangzhou 510631China Hunan Key Laboratory for Computation and Simulation in Science and Engineering Xiangtan UniversityXiangtan 411105China

For fractional Volterra integro-differential equations(FVIDEs)with weakly singular kernels,this paper proposes a generalized Jacobi spectral Galerkin *** basis functions for the provided method are selected generalized Jacobi functions(GJFs),which can be utilized as natural basis functions of spectral methods for weakly singular FVIDEs when appropriately *** developed method's spectral rate of convergence is determined using the L^(∞)-norm and the weighted L^(2)-*** results indicate the usefulness of the proposed method.

关键词： Generalized Jacobi spectral Galerkin method Fractional-order Volterra integ-ro-differential equations Weakly singular kernels Convergence analysis